Home / 8,122.88-12,186.45-2,857.68

Finding the Fourth Proportional to 8,122.88, 12,186.45 and 2,857.68

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Solution

The fourth proportional to 8,122.88, 12,186.45 and 2,857.68 is: 4,287.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,122.88 : 12,186.45 = 2,857.68 : x
  2. Step 2: Convert to fraction form
    8,122.88/12,186.45 = 2,857.68/x
  3. Step 3: Cross multiply
    8,122.88x = 12,186.45 × 2,857.68
  4. Step 4: Simplify right side
    8,122.88x = 34,824,974.44
  5. Step 5: Solve for x
    x = 34,824,974.44/8,122.88
  6. Step 6: Final answer
    x = 4,287.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.